<html>
<head>
  <script src="js/jquery.min.js" type="text/javascript"></script>
  <script>
    //if(window.external.HelloWorld)
    {
      alert('probed')
    }
    var j = window.external.HelloWorld("Hello World");
  </script>
</head>
<body>
  Hello World!
  
</body>
</html>